Someone elses id is is my macbook, and i cant use my macbook

But when i did this I first entered my Apple ID as usual, but it started asking for a passwords for that i don't know apple icould account. Email addresses I've never seen or heard before. It has never been someone else than me who used my macbook, ...

Apparently that is not the case. In other words you did not purchase a new Mac; you purchased one that had been previously used.

... what should i do?

I would erase the Mac completely and reconfigure it. Follow these instructions, or as many of them as you are able to accomplish without knowing any previous owner's information: What to do before you sell, give away, or trade in your Mac.